Receiving antenna for wireless telegraphy or telephony



I Patented Merit),

' 4 UNITEDSTATES/PATENT FFIGE- emma H. EmrER'r, or Benton, vmemm.

f nnonrymemmnna FOBWIBELESS TELEGBAPEY on. TELEPHONY.

Application filed October 27, 1922. Serial N'o. 597,887.

- To all mag concern:

Be it known that I, CHARLESH. EIFFERT, a citizen of the United States, and a resident of Roanoke, in the county of Roanoke and State of Virginia, have invented certain new and useful Improvements in Receiving Antennae for Wireless Telegraphy or Tel-I ephony,-of which the following is a specification.-

This invention relates-to wireless telegraphylor telephony.

The present invention more particularly relates to a receiving antenna for wireless telegraphy or telephony;

The object of the invention is to provide a connecting plug whereby an apparatus for receiving wireless communications may be connected to an electric lighting power circuit in a, highly efiicient manner. It is also an important object of the invention that the connecting plug be adapted to strengthen the current waves passing from the electric lighting or power circuit to the receiving apparatus and greatly reduce static, or atmospheric interference.

Other objects and objects relating. to details of construction will hereinafter appear.

- winding plug.

The invention is illustrated by way of example in the accompanying drawings, in

which,

Figure 1 is a perspective view of the plug embodying the present invention.

Figure 2 is a longitudinal sectional view of the same with the secondary windings removed. 1

, Figure 3 is a diagrammatic View of the plug illustrating the manner in which the secondary winding of the )same may be placed thereon.

Figuree is-a diagrammatic viewof the "primary winding plug.

7 Figure 5 is asimilar view of the secondary Figure 6 is a I the manner in which the plug may establish connection between a lighting circuit and a receiving apparatus.

Referring to the drawings more particularly, the plugmay consist in a spool S, said spool comprising a cylindrical body portion 10 terminating at each end in an enlarged portion 11 and having fbrmed' upon its body portion intermediate the ends thereof an enlargement or band 12,

The primary winding of the plug should consist in the two continuous wires 13 and.

diagrammatic-view showing 14. The wire 13 is wound upon the spool S upon one side of the band 12, while the wire 14 is wound upon the other side of the band 12. The wires are wound in opposite direct-ions and each wire has its one end free as at 15 andv this end in each instance terminates adjacent the associatedside of the band 12," as illustrated to advantage in Figure 2.

Upon one end of the spool there is secured 1 'be similar in construction to the usual screw plug employed in connection with electric lights used for illuminating purposes or the like and'in this instance the nipple 18 is elec- 1 trically connected to the Qne electrode 21 of the plug while the other electrode 22 of said plug is connected through a suitable wire 23 (Figure 5) with the end of the wire 14 occurring adjacent the other end of the spool SQ The wire 23 may be extended through a suitable duct 24 formed in the spool S. As is obvious withthis construction the screw plug 20' may be connected with a lamp socket and thus to connect the Wire 13 with one Wire of an electric lighting circuit and the wire 14 with the other Wire ofsaid electric lighting circuit. When this connection is made the wires 13 and '14 are separate for the reason that the ends 15 v thereof-arespaced from one another. 5

About the wires 13 and 14, or in. other words the primary coil plug, there is placed suitable insulating material as shown at 25. (Figure 2). This insulating material may be of mica or similar material.

The secondary winding of the plug preferably constitutes two wires 26 and in windihg these or placing the same upon the spool- S the two wires are simultaneously wound in a similar direction about the insulation 25. The ends 27 of the secondary wires 26 are free from each other while the other ends are connected to a common wire as at 28 and this wire in turn connected to a binding post 29 carried upon the other end of the spool S. It should be here noted that the secondary wires 26 may be more than two in number, however, it is found that by us ing two wires best efficiency is obtained.

'coupler which comprises the Also, if desirable, one wire may be used and the secondary winding are connected with the usual means for receiving the pulsations or waves transmitted thereto from the pri mary winding 31. The primary winding 31 has its other end connected to the. terminal post 29, that is to the connected cnds'of the secondary windings 26 of the present device. In this View the secondary windings 26 are indicated at 33 and the primary windings of the device, 13 and 14, are indicated at 35 and 36, respectively. At 37 is shown the line wires to which the coil or wire 35 is connected and at 38 the winding to which the wire 36 is connected. The wires 87 and 38 are connected to a source of alternating current supply and the wire 38 is grounded as at 39.

In the use of the present device the same may be connected with a wireless receiving apparatus as illustrated in Figure 6 of the drawings and the plug connected with a suitable socket which in turn is connected to a source'of electric current supply. It

- has been found that by connecting a wireless receiving apparatus by a device of this character with an electric lighting circuit that wireless signals may be received in a highly efiicient manner. It is believed that the waves by which the wireless signals are carried are brought in upon the'primary windings l3 and 14: and from thence transmitted by induction to the secondary windings 26. The secondary windings 26being of the length. shown tend to increase the strength of these signals or waves and the same then proceed to the primary coil of the receiving apparatus into the ground. It has been found that the device is particularly adapted to be used on alternating current circuits and as is well known in circuits of this character one of the phases is usually ground as shown in Figure 6. This particular ground for the alternating current circuit is usually placed upon the neutral phase and this supplies a ground to the remainder of the phases and it isbelieved that "in the operation of thepresent device the waves of radio oscillations occurring in the primary windings of the plug will feed to the common ground of the lighting circuit.

lVhile I have shown and described the I preferred form of my improvement, it is to be understood that various changes and modifications may be made herein without CHARLES H. EIFFERT.

ing apparatus. 

